Metal-working machine.



L. F. 8: R. SCHULZE.

METAL WORKING MACHINE. APPLICATION FILED IAN/21. 1914.

Patented Oct. 23, 1917.

4 SHEETSSHEET 'l.

FIG.1.

L. F. m. SCHULZE. METAL WORKING MACHINE.

APPLICATION FILED JAILZI. 1914. I

* Patented Oct. 23,1917.

4 SHEET$SHEET 2.

FIG. .5.

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L. F. & R. SCHULZE.

METAL WORKING MACHINE.

APPLICATION FILED JAN. 21, I914. 1,2%3,98.. Patented mt. 23,1917.

4 SHEETS-SHEET 3.

L.- F. & R. SCHULZE. METAL WORKING MACHINE. APPLICATION FILEDJAN-21.1914.

Patented Oct. 23, 1917.

4 SHEETSSHEET 4.

Mai

FIG.

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LEON F. scnunzn AND ROBERT scHULzE, on CLEVELAND, OHIO.

METAL-WORKING MACHINE.

Specification of Letters Patent. Patented Oct. 23, 1917.

Application filed January 21, 1914. Serial No. 813,546.

ordinary multiple spindle screw machine,

wherein the entire shaping andfinishing operation, or the finishingoperation only, is performed by a tool comprising a cutting tool andbacking tool which close in diametl'ical opposition upon the stock.

The invention further relates to means by which the cutting tool and thebacking tool may automatically adjust themselves with respect to thecenter of the work holding spindle, so as to compensate for any error inthe position of said spindle.

The invention may be further briefly summarized as consisting in thecombination and arrangement of parts hereinafter set forth in thefollowing description, drawings and claims.

Referring to the drawings, Figure 1 isa' side elevation of a portion ofa multiple spindle machine showing the spindle head and tool slide withthe device applied; Fig.

2 is an end elevation of the device; Fig. 3 is an enlarged sideelevation of the member carried by the tool slide for operating thedevice; Fig. t is a top plan view of this operating member; Fig. 5 is aside elevation of the device; Fig. 6 shows the lower end with the tooland backing member; Fig. 7 is an end elevation looking at the chuck endof the spindle head; Fig. 8 shows a modified form of backing member forthe device; Fig. 9 is an el vation of this device in another position;Fig. 10 is a side elevation of the device with a modified form ofbacking tool; and Fig. 11 is a frontv elevation of the backing toolmember.

In carrying out the invention any preferred form and construction of.parts may be employed so long as they possess the necessarycharacteristics, but we-have shown an arrangement in. the drawings,which, is effective in operation, and in such embodi ment 1 representsthe main frame of the machine provided with a suitable bearing'2 for thespindle head 3 which carries .a plurality-of spindles 4h The frame isalso provided with a suitable guideway 5 for a tool slide 6. Mountedupon the top of the spin dle head is a support 7 for slides 8 adapted toreceive-radially 'moving-tools and it is upon one of these slides 8 thatthe device is mounted, although it may be mounted in any other suitablemanner, except that it' must move radially or laterally toward the work.Suitable mechanism, not shown, is provided for moving thetool toward andfrom the work, and also for operating the tool slide 6, but it is deemedunnecessary to show these mechanisms since mechanisms of this sort arecommon in the-art.

Secured to the support 7 is the main portion of the attachment, and thisattachment comprises a mainbody portion 9 secured to the slide 8 bymeans of suitable bolts 10. This main body portion is provided'near itsedges with a pair of supporting members 11 and 12 spaced apart forreceiving the operating arts of, the device. Secured in the member 11 isa pair of stop pins 13 and 14, shown in Figs. 2, 5 and 7 These stop pinsare spaced apart and are for a purposeto be described; Secured in thesupporting members 11 and12 is a suitable screw 15 passing looselythrough the member 11 and-threaded into the member 12. Pivotally mountedupon this screw or pin is a cutting tool member 16 and a backing toolmember 17.

Each of these members is provided with a portion 18 extending atright-angles thereto, and each of these right angular portions 18 isprovided with a guideway 19, as shown in Fig. 2, and in the guideway ofthe cutting tool memberv there is acutting tool 20 having an extension21 fitting into the guideway 19 and a slotted opening 22 for acla-mpingbolt 23. This cutting tool is adjusted by means of an adjusting screw 2%threaded into the end of'the right angular portion 18 of the cuttingtool member and having a flange 25 for engaging the back end of thecutting tool; In this way the cutting tool is adjusted and clamped inany desired position by the clamping bolt 23. In a similar manner, thebacking tool member is provided with a backing tool 27 which is adaptedto conform to the shape of the piece sufficiently to back up the workand prevent the stock from being forced out of center by the cuttingtool. This backing tool is adjusted in a manner similar to the cuttingtool. The upper portions of the cutting tool member and the backing toolmember are drawn together and the cutting tool and backing toolthemselves drawn apart, since they lie on the opposite side of thecenter, by means of a rod 28 pivoted in the cutting tool member 16extending through an opening in the backing tool member 17 and providedwith a nut 29 having a hollow portion 30 for receiving a spring 31entering an opening in the backing tool member. This nut is held inplace by a check nut 32. The spring 31 tends to force the members 16 and17 together and move the cutting tool and the backing tool apart. On theinner face of the cutting tool member is a hardened block 33 which isopposed to the hardened point 34 of a screw 35. This screw 35 forms anadjustment for regulating the throw of the two members, or in otherwords regulating the cut of the cutting tool.

Secured in the tool slide 6 is a bar 36 carrying at its end a clampingsleeve 3"? having rigid therewith an arm 38. The outer end of this baris provided with a radially disposed opening 39 and with a spring socket40 in alinement with this opening 39. Mounted in the opening 39 is ablock %1 integral with a projecting arm 42 having rounded corners e3 atthe end. The faces formed by these rounded corners are adapted to enterbetween the hardened block 33 and the end of the adjusting screw 35. Theblock 41 is provided with an open-- ing a l adapted to receive a pin 45extending through the sides of the arm 38 at the opening 39 and the pin45 is preferably made smaller than the opening 1% and the block 41 madeslightly narrower than the open ing in the arm, as shown in Fig. 4 sothat the projecting arm 4:2 may not only have rocking movement about thepin as, but will move transversely to the axis of pin 45, due to thelarge hole 14, and also move slightly lengthwise of the pin, due to theopening 39 being wider than block 411. In

order to hold this block 41 and arm 4:! in proper position a suitablespring actuated follower is provided, and it comprises a follower plate16 integral with a stem 47 passing into the opening 40 and through theback of the arm, as shown in Fig. 3. Around the stem 47 is suitablespring 4-8. By the arrangement of the parts, the follower block e6presses against the back of the block 47 and normally holds the arm 12in proper position with respect to the other parts, the parts beingadapted to give slightly to account for slight variations 1n adjustment.

In use, the cutting tool is made with a cutting edge to conform in crosssection to the configuration of the article to be made and the backingtool is made of similar configuration. At the proper step in the cycleof operation of the machine, this tool is advanced laterally toward thestock until the edge of the cutting tool stands in proper relation withrespect to the stock. At the proper time the tool slide advances and therounded corners of the arm 42 enter between the hardened block 33 andthe end 34. of the adjusting screw 35 and cause the cutting tool memberand the backing tool member to be moved outward, with the result thatthe cutting tool and the backing tool are pressed inward toward thestock. The pivoted mounting of the cutting and hacking tools allows thecutting tool and the backing tool to press with equal force against thestock thereby supporting it during the cutting operation and alsoallowing.

the cutting tool and backing tool to automatically adjust themselves toexact position with respect to the working center of the spindles. Thestock is thus shaped and finished according to the shape of the cuttingtool. Upon the return of the tool slide to idle position, the cuttingtool and backing tool are moved away from the work and the entireattachment is withdrawn as is customary in the different operations ofma chines of this type.

In F 8 and 9 we have shown a modified form of backing tool wherein thebacking tool member 17 is provided with a roller 49 pivoted upon a pin50 mounted in suitable ears 51 carried by the backing tool block w 52.This roller is made to conform properly to the work and by the use of itfriction between the work and the backing tool is materially lessened.

From the construction of the device, it is quite obvious that thecutting tool and backing tool members as well as the operating cammember mounted upon the slide will adjust themselves to slightvariations in the centers of the spindles, and the tool willv always cutin diametrical opposition to the backing tool in spite of suchvariations. As a matter of fact there is substantially no variation inthe sizes of the finished articles due to variations in the centers ofthe spindles or other slight inaccuracies in the arrangement of theparts in view of the automatic self adjusting feature. In view of thefact that the cutting tool always cuts in diametrical opposition to thebacking tool, the device may be utilized for shaping an article from thestock to the finished product without a previous roughing or shapingopera-' tion, and this result is attained because of the cutting beingin diametrical opposition to the backing.

In the modification shown in Figs. 10 and 11, the backing tool block 52supports a pair of pins 53 and 54 upon which are mounted backing rollers55 and 56, these rollers being so arranged that lines drawn from theirpoint of tangency with respect to the work to the point ofapplication'of the cutting edge of the cutting tool' will beequal. In this way thestock is firmly backed with respect to the cutting operation.

Having described our invention, we claim 1. In a metal working, machine,in combination, a stock spindle, a shaping tool having a cutting edge, abacking tool and means for operating said tools, said tools and saidoperating means being movable during operation relative to the stockspindle to cause automatic adjustment of the tools toward and from eachother to center them about the stock spindle, thereby permitting theshaping operation to be per formed without any tendency of moving thestock out of the center line of the spindle.

2. In a metal working machine in combination, a stock spindle, a shapingtool having a cutting edge, a backing tool, supporting means for saidtools, an operating device for moving the cutting tool and the backingtool into engagement with the work, and a support for said operatingdevice, the tools and the operating device being so mounted in theirsupports that the said tools automatically adjust themselves to the workwhereby the shaping operation is performed without any tendency ofmoving the stock out of the center line of the spindle.

3. In a metal working machine in combination, a stock spindle, a shapingtool comprising a cutting tool, a backing tool, said entire device beingsupported against longitudinal movement during the working operationwith respect to the stock and adapted to close against the stock, meansfor operating said tools and a support for said means, said operatingdevice being mounted in its support so as to actuate the tools and atthe same time permit them to automatically adjust themselves whereby theshaping operation is performed without any tendency of moving the stockout of the center line of the spindle.

4:. In a metal working machine in combination, a stock spindle, ashaping tool comprising a cutting tool, a backing tool, said entiredevice being supported against longitudinal movement during the workingoperation with respect to the stock and adapted to close against thestock, an operating device for said tools, a support for said operatingdevice, and yielding connections between the operating device and itssupport and permitting the tools in their engagement with the work toadjust themselves with respect to the center line of the spindle.

5. In a metal working machine in combination, a rotating work spindleand a longitudinally stationary cutting device comprising atransverselymoving cutting tool and a transversely moving backing tool adapted to beoperated concurrently and conjointly toward and from the center of thework spindle and to automatically adjust themselves relative to thecenter of the work spindle, and an operating member to thus operate thecutting and backing tools.

6'. Anattachment for metal working machine's comprising a main body'portion,a cutting tool member, a backing tool memher, said membersbeing? pivotediir said main bodyportion, a cutting tool adjustablymounted on the cutting tool member, abacking tool adjustably mounted onthe backing tool member, means for holding said tools in a normally openposition, and means for moving said tools into operative position andinto engagement with the work, said means for moving the tools beingadapted to give in its operation and permit the tools to adjustthemselves to the center of the stock spindle;

7 .An attachment for metal working machines comprising a main bodyportion, a cutting tool member pivoted therein, a backing tool memberalso pivoted insaid main body portion, suitable stops for said members,means for forcing said members into engagement with said stops, acutting tool block movably mounted on the cutting tool member, means forholding said block in any adjusted position, a backing tool blockmovably mounted in said backing tool member, means for holding saidbacking tool block in any adjusted position, and means for moving thetools of said members into operative position, said means for moving thetools being adapted to give in its operation and permit the tools toadjust themselves to the center of the stock spindle.

8. An attachment for metal working machines comprising a main bodyportion, a cutting tool member pivoted therein, a backing tool memberalso pivoted in said main body portion, means for forcing said memberstoward each other, a cutting tool block movably mounted on the cuttingtool member, means for holding said block in any adjusted position, abacking tool block movably mounted in said backing tool member, meansfor holding said backing tool block in any adjusted position, and meansfor moving the tools of said members into operative position andcomprising a bar having camming faces for engagement with said members,a support for said bar suitably mounted and connections between the barand the support for permitting it to have a slight movement and allowingthe tools to equalize themselves upon the work and with respect to thecenter of the stock spindle.

9. An attachment for metal working machines comprising a main bodyportion, a

cutting tool member pivoted therein, a backing tool member also pivotedin said main body portion, means for forcing said members toward eachother, a cutting tool block slidably mounted on the cutting tool member,means for holding said cutting tool block in any adjusted position, abacking tool block movably mounted in said backing tool member, meansfor holding said backing tool block in any adjusted position, and meansfor moving the tools of said members into operative position andcomprising a bar having camming faces for engagement with said members,and means for permit ting a slight movement of said operating 15 memberto allow for inaccurate position of the parts, and for permitting thetools to automatically adjust themselves to the stock and to the centerline of the stock spindle.

In testimony whereof We afliX our signatures in presence of tWoWitnesses as fol- OWSZ LEON F. SCHULZE. ROBERT SCHULZE.

Witnesses:

G. O. FARGUHARSON, C. H. TRESOH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

